Pen Is Scrollbar

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Pen Is Scrollbar",
  "manifest_version": 2,
  "version": "0.1.3",
  "description": "Turn your browser’s scrollbar (or a friend’s) into a nice, minimal pen.",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "scrollbar.css"
      ]
    }
  ]
}